The value of x for the maximum value of√3 cos x + sin x, is
30o
45o
60o
90o
The value of sin 20o sin 40o sin 60o sin 80o is equal to
-3/16
5/16
3/16
-5/16
(tan 7o) (tan 23o) (tan 60o)(tan 67o)(tan83o) is
0
7
1
√3
The value of cos 1o cos 2o cos 3o .... cos 100o =
-1
None of these
The value of cos 15o is
The value of cot (45o + θ) cot (45o - θ) is:
∞
If sin (∝ - β) = 1/2 and cos (∝ + β) = 1/2, where ∝ and β are positive acute angles, then:
∝ = 45o
β= 15o
∝= 15o, β = 45o
∝ = 60o, β = 15o
The value of 1+ cos 56o + cos 58o - cos 66o is equal to
2 cos 28o cos 29o cos 33o
4 cos 28o cos 29o cos 33o
4 cos 28o cos 29o sin 33o
2 cos 28o cos 29o sin 33o
If cos θ = 1/2 (x + 1/x), then 1/2 (x2 + 1/x2) is equal to
sin 2 θ
cos 2 θ
tan 2 θ
sec2 θ